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near-infrared radiation

   Also found in: Dictionary/thesaurus, Acronyms 0.01 sec.
near-infrared radiation [′nir ‚in·frə′red ‚rād·ē′ā·shən]
(electromagnetism)
Infrared radiation having a relatively short wavelength, between 0.75 and about 2.5 micrometers (some scientists place the upper limit from 1.5 to 3 micrometers), at which radiation can be detected by photoelectric cells, and which corresponds in frequency range to the lower electronic energy levels of molecules and semiconductors. Also known as photoelectric infrared radiation.


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For example, Tiina Karu, PhD, showed that respiratory chain molecules (such as cytochrome c oxidase) in the mitochondria absorb visible and near-infrared radiation.
Several wavelengths of laser energy have been used for hair removal, from visible light to near-infrared radiation.
The tubes, when non-invasively exposed to laser-generated near-infrared radiation, respond by vibrating, creating heat.
 
 
 
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